Where do you think the extra Kinetic energy comes from?

It comes from the work of Gravitational force

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External agent does some work on ballerina.

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Internal work done against centrifugal force

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Avinash is just fooling around.

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Solution

The correct option is C Internal work done against centrifugal force
Explanation is in the next videclip. Do give it a serious thought before you proceed!

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